PROBLEM TO BE SOLVED: To obtain a light control unit capable of forming a wide band of light by combining a plurality of luminous fluxes with high efficiency, and an optical tomographic imaging device capable of acquiring a tomographic image of high resolving power at a high speed using the light control unit.SOLUTION: The optical tomographic imaging device 1 is equipped with the light control unit 10 for combining a plurality of luminous fluxes to output the same. The light control unit 10 is equipped with an emission part 11 capable of emitting at least three luminous fluxes respectively swept in wavelength within mutually different wavelength bands, wavelength combination means 15a and 15b having a wavelength selectivity for combining at least two luminous fluxes among at least three luminous fluxes to emit them and a control means 16 for controlling so as to output at least one luminous flux to a time zone different from at least another one luminous flux on the upstream or downstream side of the emission part 11 and the wavelength combination means 15a and 15b in a luminous flux light path. At least two luminous fluxes mutually different in wavelength are combined to be outputted at the same time.COPYRIGHT: (C)2008,JPO&INPIT【課題】複数の光束を高効率に合波して広帯域の光を形成可能な光制御ユニットと、該光制御ユニットを用いて高速に高分解能の断層画像を取得可能な光断層画像化装置を得る。【解決手段】光断層画像化装置1は、複数の光束を合波して出力する光制御ユニット10を備える。光制御ユニット10は、互いに異なる波長帯域内でそれぞれ波長が掃引される3以上の光束を射出可能な発光部11と、前記3以上の光束のうち少なくとも2つの光束を合波して射出する波長選択性を有する波長合波手段である合波手段15a、15bと、発光部11、または前記光束の光路中の合波手段15a、15bの上流または下流において、少なくとも1つの光束が他の1つ以上の光束と異なる時間帯に出力されるように制御する制御手段16とを備え、互いに波長の異なる2以上の光束が合波されて同時に出力されるようにする。【選択図】図1
